Not just Archaeology, but a study of the Babylonian Astronomical Tablets establish without doubt that 587 BCE, (or possibly 586 but that is doubtful) IS the date that King Neb. destroyed Jerusalem.
The Stars do not lie ! Confirmed by NASA too.
2034 is vey close, they may give themselves more time by dropping the laughable, and verging on the insane, Eisegetical interpretation of " Daniel " altogether, and just concentrating on "We must be well in to the End Times", "because of the Signs of The Times", again a mad, and ignorant, interpretation of Scripture,but much beloved by Evangelical Christians and others.
The Albatross around their neck of 1914 will be dropped....eventually.
The more pressing thing in their effort to become a bit more mainstream is the Blood Doctrine, they may put that first on their To Do List.